Multifunctional high-frequency electric incision knifeTechnical Field
The invention relates to an electric incision knife for high-frequency cutting of pathological tissue under the guidance of an endoscope in the field of medical instruments, in particular to a high-frequency electric incision knife integrating cutting, injection and hemostasis functions.
Technical Field
Endoscope technology has been developed for over 50 years, and has gone through the stages from disease diagnosis to disease treatment, and has been very effective and reliable for treating some digestive diseases, even becoming the first-choice therapy for treatment. With the development of Endoscopic techniques in recent years, Endoscopic tissue biopsy, Endoscopic Mucosal Resection (EMR), Endoscopic mucosal dissection (ESD) have been widely used, and they are becoming the first choice for treatment of gastrointestinal hemorrhage, polypectomy, and early cancer. Among these, ESD plays a key role in the discovery, diagnosis and ablation of early cancers, among others.
Endoscopic submucosal dissection refers to an endoscopic minimally invasive technique for performing submucosal dissection on lesions larger than 2cm by using a high-frequency instrument. The technology realizes the whole excision of a larger lesion and provides accurate pathological diagnosis staging for the lesion. Compared with the traditional surgical operation, the ESD better maintains the physiological function of the digestive tract on the basis of radical treatment of tumors, obviously improves the postoperative life quality of patients, and becomes the first choice treatment method for early cancer and precancerous lesion of the digestive tract including esophagus at present.
Because of the large area of the ESD excision mucosa, the time required is long, and complications such as bleeding and perforation are high. At present, various incision knives used for endoscopic submucosal dissection generally have the functions of incising tissues and rarely have the functions of electrocoagulation and hemostasis, once the incision knives are in bleeding, the incision knives must be taken out from an endoscopic forceps channel, and the electrocoagulation and hemostasis are carried out by using the heat exchange electrocoagulation pliers, particularly when patients with abundant submucosal blood supply are met, instruments need to be repeatedly replaced, so that the operation time is greatly prolonged, the optimal hemostasis time can be lost sometimes, and the patients are subjected to excessive blood loss and unnecessary damage to surrounding tissues. In addition, the ESD procedure is cumbersome, generally time consuming, and requires endoscopic guided surgery. An endoscope firstly enters a human body to find diseased tissues, an instrument enters the human body through an endoscope channel to mark the diseased tissues, the instrument is withdrawn after marking, an injection needle is used for submucosal injection, a proper electric incision knife is used for operation after injection, about 1-2 hours, about 3cm of early cancer diseased tissues can be successfully excised, and a specimen is removed for pathological analysis. The need to change the apparatus in the operation makes the operation become more tedious to prolonged the operation time, brought the misery to the patient. Therefore, there is a need to develop a high-frequency electric incision knife integrating cutting, injecting and blood coagulation functions.
Disclosure of Invention
The invention aims to provide a multifunctional high-frequency electric incision knife device which can cut human pathological tissues, coagulate blood at high frequency, cauterize at high temperature and inject liquid, integrates cutting, injecting liquid and coagulating into a whole and can position.
Hereinafter, one end of the treatment portion is defined as a distal end, and one end of the operation portion is defined as a proximal end.
A multifunctional high-frequency electric incision knife comprising: a treatment part, a sheath part and an operation part; a treatment section at a distal end of the multifunctional high-frequency electric incision knife, including an electrode for tissue incision and liquid injection, the electrode being pushable or retractable with respect to a distal end of the sheath section, the electrode having a hollow tubular section extending in an axial direction; the clamp assembly is used for tissue hemostasis, the clamp assembly can be pushed out or retracted relative to the far end of the sheath part, the clamp assembly comprises a first chuck, a second chuck and a first pin shaft, the first chuck and the second chuck are connected through the first pin shaft, and the first pin shaft is driven to realize the opening and closing of the clamp assembly; the sheath part is positioned at the near end of the treatment part and comprises a hollow pull rod, the near end of the electrode can extend to the far end through the inside of the near-end hollow pull rod, the hollow pull rod is connected with the first chuck and the second chuck through a first pin shaft, and the hollow pull rod is operated to drive the clamp assembly to be pushed out or retracted relative to the far end of the sheath part; an insulating outer tube having a lumen extending along an axis of the sheath portion, the insulating outer tube being receptive of the hollow pull rod and the clip assembly; when the clamp assembly is in an open state, the first clamping head and the second clamping head are in a crisscross shape, and the first clamping head and the second clamping head are symmetrical in shape, so that a clamping part of the clamp assembly is formed. The electrode is characterized in that a clamping piece is arranged on the outer surface of the hollow tubular part of the electrode, a limiting block is arranged on the outer wall of the hollow tubular part of the electrode, and the limiting block is matched with the first pin shaft to control the maximum distance of the electrode extending to the far end. When the first chuck and the second chuck are closed, the clamping piece is clamped by the first chuck and the second chuck, and the minimum distance of the electrode extending to the far end is controlled. The operating part is positioned at the proximal end of the sheath part and comprises a high-frequency current connector connected with the electrode through a lead; a component for driving the electrode to move through an operation wire; a member for driving the hollow pull rod to move; and a liquid inlet port through which a liquid can be passed to the hollow tubular portion of the electrode.
Preferably, the member is a slider that slides back and forth along the stem to extend or retract the clip assembly.
Preferably, the component is a thumb ring disposed at the proximal end of the operating portion.
The sheath part also comprises a spring tube which is embedded outside the outer layer of the hollow pull rod. The outer surface of the far end of the hollow pull rod is covered with a fixed seat which is connected with the tail end of the far end of the spring tube. The operation part also comprises a core rod which extends along the axial direction of the high-frequency electric incision knife, and the far end of the core rod is connected with the insulating outer tube.
The sheath part has flexibility and comprises a fixed seat, a hollow pull rod, a spring tube and an insulating outer tube. A treatment unit provided on a distal end side of the sheath unit, the treatment unit including: a clip assembly and an electrode; the operating part is arranged at the near end of the sheath part and is used for operating the treatment part and comprises an electrode tip, a slide block, a liquid inlet, a thumb ring and a core rod.
The processing unit includes: a clip assembly and an electrode. Wherein the clip subassembly includes: the hemostatic forceps comprise a first chuck, a second chuck, a first pin shaft, a second pin shaft, a third pin shaft, a fourth pin shaft, a fifth pin shaft, a first forceps arm, a second forceps arm, a third forceps arm, a fourth forceps arm and a clip assembly, wherein the clip assembly is used for tissue hemostasis, the clip assembly can be pushed out or retracted relative to the far end of a sheath portion, the clip assembly comprises the first chuck and the second chuck, the first chuck and the second chuck are connected through the first pin shaft, and the first pin shaft is driven to realize opening and closing of the clip assembly. The hollow pull rod is movably connected with the third tong arm and the fourth tong arm through a first pin shaft, the third tong arm is movably connected with the first tong arm through a third pin shaft, the fourth tong arm is movably connected with the second tong arm through a fourth pin shaft, and the first tong arm and the second tong arm are movably connected with the hollow pull rod through a fifth pin shaft and a second pin shaft respectively. The first chuck and the second chuck are crossed and movably connected at the crossed positions through a first pin shaft to form a clamping part of the clamp assembly. The first chuck and the second chuck are symmetrical in shape, and after the first chuck and the second chuck are combined, the end parts of the first chuck and the second chuck form any one of a T shape, an L shape, a cylinder shape or a sphere shape. When the electrode bulge part is contacted with the lesion tissue, the first clamping head and the second clamping head are closed. The first clamping head and the second clamping head are externally coated with a film or ceramic and can play a role in insulation. The first clamp arm and the second clamp arm can also be in hook-type structures at the tail ends and are respectively movably connected with the first chuck and the second chuck through a third pin shaft and a fourth pin shaft; the electrode includes: a hollow tubular portion extending in an axial direction and a protrusion at a distal end. The distal end of the electrode extends outward from the axis of the hollow tubular portion in a direction perpendicular to the axis of the hollow tubular portion by a length greater than the radius of the cross section of the hollow tubular portion of the electrode, and the outward extending portion forms a protrusion at the distal end of the electrode. Preferably, the cross-sectional profile of the projections is divergent, for example circumferential, triangular, or Y-shaped. The bulge can be in a three-dimensional shape such as a hemisphere, a sphere, a cylinder, a triangular prism, a Y character and the like, the electrode is connected with a power supply, and the bulge can cut target lesion tissues and serve as a tool bit part of the whole high-frequency electric incision knife. The electrode may have only a hollow tubular portion extending in the axial direction, in which case the hollow tubular portion serves as the tool bit portion of the entire high-frequency electric incision knife. The outer wall of the hollow tubular part of the electrode is provided with clamping pieces which are blocky, annular or tubular, wherein the blocky clamping pieces can be a group of clamping blocks which are mutually spaced. The electrode is made of a metal material, the metal material is not limited to stainless steel, titanium, tungsten and other materials with conductivity, and the electrode can be pushed out or retracted, and when the electrode is pushed out, the target lesion tissue is cut. One part of the hollow tubular part of the electrode is positioned in the core rod, the other part of the hollow tubular part of the electrode extends out of the core rod, the part of the hollow tubular part of the electrode extending out of the core rod is provided with an insulating outer tube, and the position of the insulating outer tube is fixed. Wherein the electrode hollow tubular part extends from the far end side of the sheath part to the operating part in the axial direction of the sheath part and is connected with the thumb ring of the operating part through an operating wire.
The sheath portion is provided at the proximal end of the treatment portion, and includes: the fixing base, hollow pull rod, spring pipe, insulating outer tube, fastener. The insulating outer tube is coated with an insulating coating to play an insulating role. The insulating outer tube has the lumen that extends along the axis of sheath portion, is equipped with the fastener on the hollow tubular portion outer wall of the electrode in the insulating outer tube, and when the fastener moved the first chuck of closed condition and second chuck distal end, the fastener was blocked by the chuck, realizes the location, and electrode extension length was minimum this moment. Also can be according to the demand, be equipped with the stopper on the hollow tubulose portion outer wall of electrode, the stopper is blocked by first round pin axle to the removal of electrotomy sword distal end, through the cooperation of stopper and first round pin axle to the maximum distance that the control tool bit stretches out.
The limiting block is block-shaped or annular. The clamping piece and the limiting block can be provided with an insulating coating or are insulated by themselves. The limiting block can be arranged on the outer wall of the hollow tubular part of the electrode at a certain distance, and the length of the cutter head is reserved, so that the hollow tubular part and the protrusion of the electrode can be completely taken into the insulating outer tube. When the position of the clamping piece is flush with the tail end of the far end of the insulating outer tube, the cutter head is only partially accommodated in the insulating outer tube. The spring tube adopts a spiral piece covered with an insulating coating or a hollow hose with a conducting layer, so that the sheath part can be freely bent in the endoscope and can better pass through the curve of the endoscope. A layer of hollow pull rod is embedded outside the outer layer of the near end of the hollow tubular part of the electrode. The outer layer of the hollow pull rod is externally embedded with a layer of spring tube. The spring tube and the hollow tubular electrode part are used as driving parts and are parts for torque transmission, double drives are formed in the sheath part, and meanwhile the near end of the spring tube is communicated with the hollow tubular electrode part to realize the conduction of a circuit. The far end of the spring tube is provided with a fixed seat which can be connected with the pull rod and the far end of the spring tube.
The operation unit includes: electrode tip, slider, liquid inlet, core pole, thumb ring. The core bar extends along the axial direction of the high-frequency electric incision knife, the far end of the core bar is connected with the insulating outer tube, a thumb ring for controlling the movement of the hollow tubular part of the electrode is arranged at the tail end of the core bar, and the thumb ring can be round, square, oval and the like. The thumb ring is connected with the near end of the hollow tubular part of the electrode, the inner diameter of the hollow tubular structure of the electrode is smaller than that of the core bar, so that the thumb ring is pulled, the hollow tubular part of the electrode can be pulled back and forth along the interior of the core bar to withdraw or withdraw the electrode, and the limit block on the outer wall of the hollow tubular part is abutted against the first pin shaft, so that the accurate limit on the extension amount of the tool bit is realized. During specific operation, if the conditions of curve and the like are met, the electrode has enough length to the core rod, and the surplus of the extending amount of the cutter head is ensured. And the middle part of the core rod is provided with a sliding block for pushing the sliding block, and the hollow pull rod can reciprocate in the cavity along the core rod so as to push out or withdraw the clamp assembly. The diameter size of the inner cavity of the core rod is larger than that of the inner cavity of the spring tube, the diameter size of the inner cavity of the spring tube is larger than that of the inner cavity of the hollow pull rod, the diameter size of the inner cavity of the hollow pull rod is larger than that of the hollow tubular part of the electrode, and the hollow tubular part of the electrode is ensured to be coaxially inserted into the spring tube. At the end of the core rod, a liquid inlet, for example a 6% luer, is also provided. A syringe or an infusion pump may be connected to the 6% luer connector for infusion, such as injection of saline, etc. The electrode tip is positioned at the distal end of the operating part, the electrode tip is connected with the spring tube in the electric incision knife, and the electrode tip is externally connected with a high-frequency power supply generator, wherein the high-frequency power supply generator comprises 60-8200-230, Erbo (ERBE) VIO300S, 300D and the like which are not limited to Kangmei (CONMED).
In the actual operation process, can move insulating outer tube to the near-end earlier, promote the slider and remove to the high frequency electricity incision sword distal end, the motion of first chuck of hollow pull rod drive and second chuck, first chuck and second chuck can open and shut and rotate under the drive of spring tube and the hollow tubulose portion of electrode for first chuck and second chuck open, can carry out the electricity coagulation hemostasis as hemostatic forceps, and the clip subassembly can freely rotate, conveniently accurately snatch the bleeding point. When hemostasis is finished, the sliding block is pushed to move towards the near end of the high-frequency electric incision knife, and the first chuck and the second chuck are closed. The thumb ring is pushed to move towards the far end of the high-frequency electric incision knife, the electrode is extended out, and the electrode bulge is used as an incision knife to perform the incision of the lesion tissue. The electrode may have only a hollow tubular portion extending in the axial direction, and the lesion tissue may be cut by the hollow tubular portion. When tissue needs to be injected, the distal end of the electrode can be placed in target mucosal tissue, an injection pump or an externally connected injector is connected to a 6% luer connector, physiological saline or indigo carmine is injected so as to bulge the mucosal tissue, a liquid buffer layer, namely a 'water cushion', is formed under the mucosa, the 'water cushion' effectively isolates the muscle layer from lesion, heat conduction is effectively prevented, the surgical field of vision is clearer, a blood vessel is squeezed and sealed by the water cushion, and the bleeding risk is remarkably reduced. The fluid channel may also be used to clean the bleeding site. The accessory does not need to be frequently replaced in the operation, thereby greatly reducing the operation time and improving the operation safety.
Has the advantages that:
the invention provides a multifunctional high-frequency electric incision knife, wherein an electrode is made of a metal material with a hollow tubular part so as to form a liquid channel, liquid can pass through the hollow tubular part of the electrode, submucosal injection is carried out so as to swell mucosal tissues, and a bleeding part can also be cleaned.
According to the multifunctional high-frequency electric incision knife provided by the invention, the spring tube of the sheath part adopts the spiral piece coated with the insulating coating or the hollow hose with the conducting layer, so that the electric incision knife can be freely bent in an endoscope.
According to the multifunctional high-frequency electric incision knife provided by the invention, the first clamping head and the second clamping head can be freely closed and opened, and the clamping components can freely rotate during closing, so that bleeding points can be conveniently and accurately grabbed.
According to the multifunctional high-frequency electric incision knife provided by the invention, the clamping piece and the limiting block are arranged on the outer surface of the hollow tubular part of the electrode, so that free positioning can be realized, and different knife outlet lengths can be selected according to actual conditions.
Drawings
FIG. 1 is a schematic view of a multi-functional high-frequency electric incision knife
FIG. 2 is a partially enlarged schematic view of a multifunctional high-frequency electric incision knife with a closed chuck
FIGS. 3A-3B are schematic views of a multi-functional high-frequency electric scalpel with a partially enlarged head in an open state
FIGS. 4A-4B are schematic views of a multi-functional high-frequency electric incision knife with different lengths
FIGS. 5A-5F are schematic illustrations of the distal tip of an active electrode
FIGS. 6A-6D are schematic diagrams illustrating the operation of the multifunctional high-frequency electric incision knife
FIG. 7 is a schematic view of a thumb ring
10. The treatment part comprises a treatment part 11, electrodes 111, a hollow tubular part 112, a bulge 12a, a first chuck 12b, a second chuck 13a, a first pin shaft 13b, a second pin shaft 13c, a third pin shaft 13d, a fourth pin shaft 13e, a fifth pin shaft 14a, a first clamp arm 14b, a second clamp arm 14c, a third clamp arm 14d, a fourth clamp arm 15, a clamping piece 16a, a hook structure 16b, a hook structure 17, a limiting block 20, a sheath part 21, a fixing seat 22, a hollow pull rod 23, a spring tube 24, an insulating outer tube 30, an operation part 31, a high-frequency current connector 32, a sliding block 33, a core rod 34, a thumb ring 35, a liquid inlet 40 and lesion tissue
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
Hereinafter, one end of the treatment portion is defined as a distal end, and one end of the operation portion is defined as a proximal end. As shown in fig. 1 to 3, the multi-functional high-frequency electric incision knife of the present embodiment includes a treatment section 10, a sheath section 20, and an operation section 30. The treatment portion 10 includes an electrode 11, a clamp having a first jaw 12a and a second jaw 12b, a first pin 13a, a second pin 13b, a third pin 13c, a fourth pin 13d, a fifth pin 13e, a first clamp arm 14a, a second clamp arm 14b, a third clamp arm 14c, and a fourth clamp arm 14 d. The first tong arm 14a and the third tong arm 14c are movably connected through a third pin 13c, the second tong arm 14b and the fourth tong arm 14d are movably connected through a fourth pin 13d, the first tong arm 14a can also be movably connected with a hook structure 16a, the second tong arm 14b can also be movably connected with a hook structure 16b, and the first tong arm 14a and the second tong arm 14b are respectively movably connected with a fifth pin 13e and a second pin 13 b. The third clamping arm 14c is movably connected to the tail portions of the first clamping head 12a and the second clamping head 12b through a first pin 13 a. The first pin 13a is fixedly connected to the distal end of the hollow pull rod 22, and the second pin 13b is movably connected to the distal end of the hollow pull rod 22, so that the clip assembly can be extended or retracted by pulling the hollow pull rod 22.
As shown in fig. 3A and 3B, the first clamping head 12a and the second clamping head 12B are criss-cross, and the clamp movably connected by the first pin 13A can be opened or closed, and in the opened state, the first clamping head 12a and the second clamping head 12B are criss-cross, and the first clamping head 12a and the second clamping head 12B are symmetrical in shape, so that a clamping part of the clamp assembly is formed to stop bleeding of tissues. The first and second jaws 12a and 12b may be coated with a coating or ceramic to provide insulation.
As shown in fig. 5A-5F, the electrode 11 is connected to a proximal operating wire from the distal end through a hollow pull rod 22. The electrode 11 may include a hollow tubular portion 111 extending in the axial direction and a projection 112 at the distal end, and the electrode 11 may have only the hollow tubular portion 111 extending in the axial direction without the projection 112. The distal end of the electrode 11 extends outward from the axis of the hollow tubular portion 111 perpendicularly to the axis by a length greater than the cross-sectional radius of the hollow tubular portion 111 of the electrode, the outward extension forming a protrusion 112 at the distal tip of the electrode 11.
As shown in FIG. 5A, the cross-sectional profile of the protrusion 112 is circumferentially distributed, and the protrusion 112 is a hemisphere. As shown in fig. 5B, the cross-sectional profile of the protrusions 112 is circumferentially distributed, and the protrusions 112 are spheres. As shown in fig. 5C, the cross-sectional profile of the protrusions 112 is circumferentially distributed, and the protrusions 112 are cylindrical. As shown in fig. 5D, the cross-sectional profile of the protrusions 112 is triangular, and the protrusions 112 are triangular prisms. As shown in fig. 5E, the cross-section of the protrusion 112 is Y-shaped, and the protrusion 112 has a Y-shape. As shown in fig. 5F, the electrode 11 may have only the hollow tubular portion 111 extending in the axial direction.
As shown in FIG. 2, the sheath portion 20 includes a fixing base 21, a hollow pull rod 22, a spring tube 23, an insulating outer tube 24, a clip member 15 and a stopper 26. The hollow draw rod 22 may be a hollow draw rod allowing the electrode 11 to pass therethrough. The first pin shaft 13a is fixedly connected to the far end of the hollow pull rod 22, the third tong arm 14c and the fourth tong arm 14d are movably connected with the tails of the first chuck 12a and the second chuck 12b through the first pin shaft 13a and are fixed on the hollow pull rod 22, the second pin shaft 13b is movably connected to the far end of the hollow pull rod 22, and the first tong arm 14a and the second tong arm 14b are movably connected with the hollow pull rod through the fifth pin shaft 13e and the second pin shaft 13b respectively and are movably fixed on the hollow pull rod 22, so that the clip assembly can be extended or withdrawn by pulling the hollow pull rod 22. The outer surface of the far end of the hollow pull rod 22 is covered with a fixed seat 21, the fixed seat 21 can be connected with the far end of a spring tube 23, and the spring tube 23 can increase the flexibility and the flexibility of the multifunctional high-frequency electric incision knife. The insulating outer tube 24 has a lumen extending along the axis of the sheath portion 10, in which the hollow pull rod 22 is freely movable.
As shown in fig. 2 and fig. 4A-4B, a clip 15 is provided on the outer surface of the hollow tubular portion 111. The clamping piece 15 is in a block shape, a ring shape or a tube shape, wherein the block-shaped clamping piece can be a group of clamping blocks which are mutually spaced. The outer wall of the hollow tubular part 111 of the electrode is provided with a limiting block 17, the limiting block 17 is clamped by the first pin shaft 13a, and the maximum distance extending towards the front end of the electrode 11 is controlled, so that the extending length of the electrode 11 is controlled. When the card member 15 is moved to the distal ends of the first and second jaws 12a and 12b in the closed state, the card member 15 is caught by both jaws to achieve positioning with the electrode 11 protruding to the minimum length. The limiting block 17 is block-shaped or annular.
As shown in fig. 1 and 2, the operation portion 30 is provided at the proximal end of the sheath portion 20, can push out or retract the electrode 11 and the clip assembly with respect to the front end of the sheath portion 20, and can provide a lumen for injecting a liquid. The operation part 30 includes a high frequency current connector 31, a slider 32, a core bar 33, a thumb ring 34, and a liquid inlet 35. The proximal thumb ring 34 is connected to the electrode 11 via an operation wire to control the extension and retraction of the electrode 11, and the high-frequency current connector 31 is connected to the electrode 11 via a lead wire to supply the high-frequency current to the electrode 11. The proximal end of the electrode 11 extends distally through the interior of the proximal hollow pull rod 22. A slider 32 is attached to the proximal end of the hollow pull rod 22, and the slider 32 is movable back and forth along a rod 33 to move the hollow pull rod 22 to extend or retract the clip assembly. The sliding block 32 is pushed forwards, the hollow pull rod 22 drives the first chuck 12a and the second chuck 12b to move towards the far end, the first chuck 12a and the second chuck 12b are opened gradually in a crisscross shape, the sliding block 32 is retracted backwards, and the hollow pull rod 22 drives the first chuck 12a and the second chuck 12b to contract into the insulating outer tube 23, so that the first chuck 12a and the second chuck 12b are opened and closed. The spring tube 23 and the electrode 11 are components of torque transmission as a driving portion, and double driving is formed inside the sheath portion 20, and the spring tube 23 increases a twisting force of the driving portion.
FIGS. 6A-6D illustrate the operation of the multi-functional high-frequency electric incision knife of the present invention: in practice, the multi-functional high-frequency electric incision knife of the present invention is inserted through an endoscopic lumen into the vicinity of diseased tissue 40 as shown in FIG. 6A, and in order to maintain the active electrode 11 in a retracted state, the protrusion 112 of the active electrode abuts against the first and second jaws 12a and 12b, and the first and second jaws 12a and 12b are retracted within the insulating outer tube 23. After the multifunctional high-frequency electric incision knife reaches the lesion tissue 40, the active electrode 11 is still kept in a retraction state, and the high-frequency current connector 31 of the multifunctional high-frequency electric incision knife is connected with an external high-frequency generator, wherein the high-frequency generator comprises 60-8200-230, Aierbo (ERBE) VIO300S, 300D and the like which are not limited to Kangmei (CONMED). Thereby, the high-frequency current is supplied to the active electrode 11, and the marking is performed around the lesion tissue 40, and after the marking is completed, the supply of the high-frequency current is stopped.
As shown in FIG. 6B, the multifunctional high-frequency electric scalpel of the present invention pushes the thumb ring 34 forward to protrude the active electrode 11, places the active electrode 11 at the marked point and inserts the submucosal layer of the lesion tissue 40, and injects the physiological saline or indigo carmine into the lesion tissue 40 through the fluid inlet 35 to swell the tissue.
After the swelling of the lesion tissue, as shown in fig. 6C to 6D, the high frequency current is again applied to the active electrode, and the active electrode 11 is cut in the direction shown in fig. 6C. As shown in fig. 6D, after the cutting is finished, the high-frequency current is stopped to supply, the sliding block 32 is pushed forward, the hollow pull rod 22 is driven to move forward, the clamp assembly is opened, the first clamping head 12a and the second clamping head 12b are opened in a crisscross manner, the thumb ring 34 is retracted backward to withdraw the active electrode 11, so that the opened first clamping head 12a and the second clamping head 12b can be used as a hemostatic forceps to perform electrocoagulation hemostasis, and the clamp assembly can rotate freely to facilitate accurate grasping of a bleeding point.
As shown in FIG. 7, the thumb ring may be circular, square, oval, etc.
Four functions can be realized by using the instrument with the structure. The multifunctional high-frequency electric incision knife provided by the invention has the advantages that the electrode and the clamp assembly are arranged, the functions of liquid injection, cutting and hemostasis integration can be realized simultaneously, instruments do not need to be frequently replaced in the operation process, the operation time is greatly shortened, and the operation safety is improved. In the multifunctional high-frequency electric incision knife, the electrode is made of a metal material with a hollow tubular part, the hollow part forms a liquid channel, liquid can pass through the hollow tubular part of the electrode, submucosal injection is carried out so as to swell mucosal tissue, and the bleeding part can also be cleaned. Thirdly, the spring tube of the sheath part adopts a spiral piece covered with an insulating coating or a hollow hose with a conducting layer, so that the electric incision knife can be freely bent in the endoscope. Fourthly, the first chuck and the second chuck can be freely closed and opened, and the clamp assembly is transmitted to the clamp assembly through the torsion of the spring tube and can freely rotate, so that a bleeding point can be conveniently and accurately grabbed. Fifthly, the multifunctional high-frequency electric incision knife provided by the invention has the clamping piece and the limiting block on the hollow tubular part of the electrode, so that the free positioning can be realized, and different electrode extending lengths can be selected according to actual conditions.
The foregoing is merely a preferred embodiment of the present application to enable one skilled in the art to understand or implement the invention of the present application. Various modifications and combinations of the embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.